Dwarf Mine slot from Yggdrasil Gaming

RTP: 96.8%

Dig deep with Dwarf Mine! Unearth treasures beneath the surface.

Dig deep for dazzling treasures in Dwarf Mine, an inventive casino game from Yggdrasil Gaming. Join a hardy dwarf on his quest for riches in a mine where the reels themselves hold hidden depths. The game’s main attraction is its innovative Expanding Reels feature, which can grow the grid on any spin. This combines with a Collection Free Spins bonus, where gathering special gems unlocks high-potential super free spins. Unearth the treasures that lie beneath in this high RTP slot adventure!

Provider: Yggdrasil Gaming
Release Date: 2019
RTP: 96.8%
Volatility: Medium-High
Max Win: 3,904x
Theme: Mining / Dwarves / Fantasy
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Feature Value
Reels 5
Rows 4 (expands to 7)
Paylines 1,024 (up to 16,807)
Min Bet €0.10
Max Bet €125
Max Win 3,904x
Jackpot No
RTP 96.8%
Volatility Medium-High
Hit Frequency 21.2%

Thematics and Design: The game is set in a technologically advanced dwarven mine, with a giant drilling machine serving as the reel set. The design is detailed and imaginative, blending classic fantasy dwarf elements with cool steampunk machinery, creating a unique and engaging world.

Graphics and animations: The graphics are crisp and well-polished. The drilling animation as the reels expand is a fantastic visual touch. The various gems and tools are brightly colored and stand out against the metallic background of the mine.

Sound Accompaniment: An adventurous and slightly mysterious soundtrack plays, accompanied by the mechanical sounds of the drill, clanking metal, and the echoes of the mine. The audio perfectly complements the theme of underground exploration.

Regular Symbols: The low-paying symbols are the four card suits (clubs, diamonds, hearts, spades) carved from stone. The high-paying symbols are mining equipment: a shovel, a pickaxe, a lantern, and a helmet. The dwarf’s helmet is the most valuable premium symbol.

Special Symbols:

  • Bonus Symbol: A giant drill bit is the Bonus symbol. Landing one of these on reels 1, 3, or 5 will expand that reel downwards by one row for that spin.
  • Scatter Symbol: A Free Spins gem cart is the Scatter. Landing three of these triggers the Free Spins mode.
  • Collectible Gems: Four different colored gems (blue, green, yellow, red) can appear on the expanded rows. These are collected to trigger the Collection Free Spins.

Starting your dig is easy. Set your bet amount, then press the ‘Spin’ button to power up the drill. The game starts on a 5×4 grid, but landing Bonus symbols will expand it. To see how this works, you should try the free slot machine version on our site. The game is fully optimized for a deep dive on any mobile slot screen.

Expanding Reels

The core base game feature is triggered by landing a Bonus symbol on reels 1, 3, or 5. This will cause the reel to expand downwards by one row for that spin, increasing the ways to win. It’s possible to expand all three reels, reaching a full 5×7 grid with 16,807 ways to win.

Free Spins

Landing three Scatter symbols anywhere on the reels will trigger 10 free spins. During this entire bonus round, the reels are fully expanded to the maximum 5×7 size, ensuring that all 16,807 ways to win are active on every single spin.

Collection Free Spins

This is a special, higher-potential bonus round. Below the reels are four collection meters, one for each color of gem. When you land a Collectible Gem on the expanded rows, it is added to its corresponding meter. Once you collect 5 gems of the same color, you will trigger 5 Collection Free Spins. In this mode, the reels are also fully expanded, but the only high-paying symbols that will appear are the ones that correspond to the color of the gems you collected (e.g., green gems trigger spins with only helmets).


RTP: Dwarf Mine is a very high RTP slot, featuring a fantastic Return to Player of 96.8%. This is significantly above the industry average and makes it an extremely attractive game from a statistical perspective.

Volatility: The game has medium-high volatility. The base game offers frequent excitement with the expanding reels, but the biggest treasures are buried in the Free Spins rounds, especially the highly lucrative Collection Free Spins where only the top symbols are in play.


Dwarf Mine is a brilliantly inventive and engaging slot. The expanding reels mechanic keeps the base game fresh and exciting, while the dual free spins modes provide excellent short-term and long-term goals. The high RTP is a massive plus, and the theme is executed with Yggdrasil’s usual high level of quality. It’s a fantastic adventure that offers plenty of depth and replayability. Grab your pickaxe—this is one mine that’s well worth exploring.

Pros Cons
✅ Excellent high RTP of 96.8% ❌ Max win is lower than some comparable slots
✅ Innovative expanding reels mechanic ❌ Collecting gems for the special free spins can take a long time
✅ Two different and exciting Free Spins modes ❌ Base game hits can be small
✅ Fun theme with great graphics and sound

Suitable for: Players who enjoy innovative mechanics, fans of fantasy themes, and those looking for high RTP slots.


What is the RTP of Dwarf Mine?

The RTP of Dwarf Mine is a very high 96.8%.

Can I play Dwarf Mine for free?

Yes, you can play a demo of this free slot machine on our site to explore its expanding reels and collection features risk-free.

Does Dwarf Mine have a free spins feature?

Yes, it has two! A regular Free Spins round on a fully expanded grid, and a special Collection Free Spins round with only high-paying symbols.

What is the maximum win in Dwarf Mine?

The maximum potential win in this slot is 3,904 times your stake.

Is Dwarf Mine mobile-friendly?

Yes, Dwarf Mine is perfectly optimized with HTML5 technology to work on all mobile phones and tablets.


  • Valley of the Gods 2 (Yggdrasil): Another Yggdrasil slot featuring an innovative reel expansion mechanic.
  • Holmes and the Stolen Stones (Yggdrasil): A detective-themed slot that also features a gem collection mechanic leading to jackpots.
  • Bonanza Megaways (Big Time Gaming): The legendary mining-themed slot that popularized the Megaways mechanic with expanding ways to win.
  • Gonzo’s Quest (NetEnt): An adventure slot with its own iconic cascading reel mechanic.
  • Spelunker (CQ9 Gaming): A different take on the mining theme with its own unique features.

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